ShakeAlert (Earthquake Early Warning) test scheduled for 11 AM, Thursday, June 27

All cell phones in San Diego County area will receive this test message at 11 AM on Thursday, June 27, 2019, to test ShakeAlert, the Earthquake Early Warning system. The San Diego County Office of Emergency Services together with the California Governor’s Office of Emergency Services and the United States Geological Survey will be conducting a test at 11 AM on June 27 using the Wireless Emergency Alert system. The test will affect all mobile phones in the county area and will evaluate if the system could be effectively used for the California Earthquake Early Warning, also called a ShakeAlert.

At the test time, all wireless phones in San Diego County, even phones of non-residents, will be sent the notification using geofencing technology. The WEA messages are sent to phones during emergencies such as severe weather or for AMBER Alerts. Mobile phones will receive the test message, preceded by a loud tone. While the tone may be startling for those who are not aware of the test, there is no need for alarm. No action is necessary at this time.

Information from Yvette Urrea Moe, County of San Diego Communications Office; for more information, visit

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